# Annalist Prediction Market Outcomes List

> Annalist Prediction Market Outcomes List is a paid API for AI agents from api.annalist.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-14).

Lists prediction market outcomes with implied probabilities, 24h volume, and searchable titles across categories like sports, price, IPO, policy rate, and awards

## Facts

- Endpoint: GET https://api.annalist.dev/v1/outcomes/list?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/annalist-prediction-market-outcomes-list-75bd62fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1ilmEQ0xJcyaIOHuyWD_Z

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability annalist-prediction-market-outcomes-list-75bd62fa
```

Example prompt: What does the prediction market crowd think about Anthropic's first-day market cap — search Annalist for any open outcomes related to Anthropic and show me the implied probabilities and 24h volume.

## When to prefer this

Use this endpoint when you need to discover or search available prediction market outcomes and their crowd-implied probabilities, especially when filtering by category (sports, price, IPO, policy rate, awards) or searching by keyword. Prefer this over generic news or sentiment APIs when you specifically want market-priced probability signals from real money on the line.

## Known failure modes

- Invalid category enum value returns error — must be one of: sports, price, ipo, policy_rate, awards, other
- No results returned if search query 'q' matches no outcome titles
- Payment failure via x402 if USDC balance is insufficient ($0.02 per call)
- Empty outcomes array if no markets are currently active in the requested category

## How this service works

Signed data for AI agents, paid per call over x402. Hyperliquid crowd state, smart money and liquidations with what historically happened next, plus independent checks of x402 services and MCP servers.

## Output

A JSON object containing a summary with total market count and an array of outcome objects, each with an id, title, 24h USD volume, and implied probability (0-1 float representing crowd consensus on the event occurring).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "q": {
       "type": "string",
       "description": "text to find in titles, for example Fed or Anthropic"
      },
      "category": {
       "enum": [
        "sports",
        "price",
        "ipo",
        "policy_rate",
        "awards",
        "other"
       ],
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "summary": {
    "markets": 327
   },
   "outcomes": [
    {
     "id": 8573,
     "title": "Anthropic first-day market cap above $1500B",
     "volume_24h_usd": 318704,
     "implied_probability": 0.81
    }
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/annalist-prediction-market-outcomes-list-75bd62fa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.annalist.dev](https://www.zero.xyz/host/api.annalist.dev/llms.txt)